Let’s learn about expressing possibility now.
The verbs may, might and could show possibility now and in the future.
In this case, they have the same meaning. Look at this conversation:
A: My mother said that it may snow tomorrow.
B: Really? It might snow?! That’s great! I could make a snowman or go for a “snow” walk.
A: Don’t get too excited. If the temperature is high, it may not snow. It may rain.
B: Well, I guess I could still go for a walk in the rain.
Be careful with may + “be” and “maybe”. Compare these sentences. Both are correct.
Ann is not here today. She may be sick. ➨ “may be” is a modal.
Ann is not here today. Maybe she is sick. ➨ “Maybe” is an adverb.
Note: 'may' only occurs in the simple form (it does not take an 's' with 'he', 'she' and 'it').
'May', 'might' and 'could' never take 'to'.